bromley



(No Model) R. G. BROMLEY.

VALVE.

No. 593,411. Patented Nov. 9,1897.

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UNITED STATES PATENT QEEIQE.

ROBERT C. BROMLEY, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO THE PITTSBURGVALVE AND MACHINE CO., LIMITED.

VALVE.

SPECIFICATION forming part of Letters Patent No. 593,411, dated November9, 1897.

Application filed December 10, 1896- Serial No. 615,168. (No model.)

T (0% whom it may concern.- 1

Be it known that I, ROBERT C. BROMLEY, a citizen of the United States,residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented or discovered a new and useful Improvementin Valves, of which the following is a full, clear, and exactdescription, reference beinghad to the accompan ying drawings, formingpart of this applilo cation, in which Figure 1 is a central verticalsectional view of .a valve made in accordance with my invention. Fig. 2is a similar View showing the plugturned to register with the openingsin r 5 the valve-casing. Fig. 3 is a cross-section on the line III IIIof Fig. 1. Fig. 4 is a sectional perspective view of the lower partofthe plug. Fig. 5 is a perspective detail View of the temper-screw.

My invention consists of an improvement in valves, and relates moreparticularly to the means for limiting the throw or travel of thevalve-plug and for setting it tightly to its seat, together with meansfor adjusting and taking up the wear of such mechanism without removalof the plug or any of the parts.

Referring to the drawings, 2 is the valvecasing provided with suitableinlet and outlet ports and a central tapered seat 3. Within 0 the casing is the plug 4, tapered to correspond to the seat 3 and provided withthe lateral opening 5, coinciding with the inlet and outlet ports whenin an open position, as shown in Fig. 2, and adapted to close such portswhen turned at right angles, as in Fig. 1. An extended stem 6 projectsupwardly through a suitable stuffiing-box, forming a part of thevalve-casing, in the bottom of which is placed a suitable gasket 7,while at the bottom the 4o plug is provided with an extended circularsleeve 8. The base of the valve-casing is flanged, and secured theretoby bolts is alower head 9, in the center of which is an extendeddownwardly-projecting internally-screw- 5' threaded housing 10. A bolt11,provided with a polygonal head 12, is screwed downwardly into thethreaded housing 10, sufficient play being allowed so that when screweddown to about the bottom of the threaded cavity in the housing the headwill occupy the space within the sleeve 8, the internal diameter ofwhich is sufficiently large to allow the plug 4 to be rotated withoutinterference with the head of the bolt. In the central base of the plugand immediately above the space within 5 5 the sleeve 8 is a polygonalcavity 13, corre sponding to the shape of the head 12 and slightlylarger to permit of an easy fit thereon. An annular groove 14 is made inthe upper face of the flange 9 to permit of a slightly- 6o downwardmovement of the plug, by which action the head of the bolt willbe'engaged by the polygonal cavity 13, when upon rotating the plugmotion will be imparted to the screw 11 and it will be caused to riseupon its threads until the head 12 will occupy the cavity 13, as shownin Fig. 1. Continued rotation of the plug will cause the head 12 to seatitself against the top of the cavity 13, resulting in an upward pressureupon the plug, whereby it will be caused to seat itself against the seat3 of the valve-casing, and by reason of the polygonal head and cavitythe relation of the plug to the head 12 may be so adjusted as to causethe head in its upward travel to bind against the base of the plug,seating it against the valve-seat and arresting its further movement,when the plug is turned to the closed position shown in Fig. 1, andbackward movement of the plug will, by similarly 8o rotating the screw,cause it to travel downwardly and immediately relieve such pressure.

In order to hold the plug to its seat at all times with a moderatepressure, ports 14 are made communicating with the central opening 5 andleading upwardly and downwardly, supplying pressure upon the shoulders15 16 of the plug, the lower of which, by reason of its greater area,will receive a greater prcssure and such excess of pressure will serveto always keep the valve to its seat.

A packing-ring 17, interposed between the flanged base and head 9 andembracing the sleeve 8, makes atight joint against leakage.

The operation of my device will be readily understood from the foregoingdescription, and the advantages of my construction will be appreciatedby the skilled mechanic.

By permitting the plug to be disengaged from the bolt and turned for oneor more faces of the polygonal head without removing any of the partsthe operation of setting and adjusting the plug to its seat so as tobind at the termination of its movement is rendered comparatively simpleand expedient.

Having described my invention, what I claim is 1. A valve having achambered tapered plug, a threaded screw mounted in a part of thevalve-casing, and in engagement with the plug whereby rotation of theplug will rotate the screw and advance it toward or from the plug inline with its axial center, substantially as set forth.

2. A Valve having a chambered tapered plug, a polygonally-headed screwmounted in a part of the valve-casing, and a similarlyshaped polygonalcavity in the plug for engagement with the head of the screw,'substantially as set forth.

3. A valve comprising a casing having a tapered seat, acorrespondingly-tapered plug, a polygonal cavity in the base of theplug, an extended sleeve beyond such cavity, and apolygonally-headedscrew-threaded bolt mounted in a part of the valve-casing and adapted tobe engaged by the cavity of the plug, substantially as set forth.

t. A valve comprising a casing having a tapered seat, acorrespondingly-tapered plug, a

polygonal cavity in the base of the plug, an

extended sleeve beyond such cavity, a flanged head comprising a part ofthe valve-casing provided with clearance-space for the extended sleeve,and a threaded socket, and a packing ring surrounding the extendedsleeve, substantially as set forth.

5. A valve comprising a casing having a tapered seat, acorrespondingly-tapered plug, a polygonal cavity in the base of theplug, an extended sleeve beyond such cavity, a flanged head comprising apart of the valve-casing provided with clearance-space for the extendedsleeve, and a threaded socket, a packingring surrounding the extendedsleeve, and pressure surfaces and chambers at each end of the plug withports leading thereto from the central opening, substantially as setforth.

In testimony whereof I have hereunto set my hand this 2d day of October,1896.

ROBERT C. BROMLEY.

\Vitnesses:

PETER J. EDW RDS, C. M. CLARKE.

